/*  see copyright notice in squirrel.h */
#ifndef _SQUSERDATA_H_
#define _SQUSERDATA_H_

struct SQUserData : SQDelegable
{
	SQUserData(SQSharedState *ss)
	{
		_delegate = 0;
		_hook = NULL;
		INIT_CHAIN();
		ADD_TO_CHAIN(&_ss(this)->_gc_chain, this);
	}
	~SQUserData()
	{
		REMOVE_FROM_CHAIN(&_ss(this)->_gc_chain, this);
		SetDelegate(NULL);
	}
	static SQUserData *Create(SQSharedState *ss, SQInteger size)
	{
		SQUserData *ud =
				(SQUserData *)SQ_MALLOC(sq_aligning(sizeof(SQUserData)) + size);
		new(ud) SQUserData(ss);
		ud->_size = size;
		ud->_typetag = 0;
		return ud;
	}
#ifndef NO_GARBAGE_COLLECTOR
	void Mark(SQCollectable **chain);
	void Finalize()
	{
		SetDelegate(NULL);
	}
	SQObjectType GetType()
	{
		return OT_USERDATA;
	}
#endif
	void Release()
	{
		if(_hook)
			_hook((SQUserPointer)sq_aligning(this + 1), _size);
		SQInteger tsize = _size;
		this->~SQUserData();
		SQ_FREE(this, sq_aligning(sizeof(SQUserData)) + tsize);
	}


	SQInteger _size;
	SQRELEASEHOOK _hook;
	SQUserPointer _typetag;
	//SQChar _val[1];
};

#endif //_SQUSERDATA_H_
